Like all things, "normal" is a relative term, dependent on many subjective perceptions, and it also depends on if the validators are actually granting credit lest the pending keep building.

Some of the top crunchers can have over 200,000+ worth of pending credits. Others have a more modest few thousand worth of pending credits. People with a very small RAC will probably see only a few hundred worth of pending credits.

I don't even bother to look at my own, so I couldn't even tell you what mine is. And I'm not even giving SETI the bulk of my processing time.

Since your RAC is still increasing its hard to say how much Pending you should have. I've noticed that most big rigs have about 3-5X their RAC in pending. you seem to be right where you should beIn a rich man's house there is no place to spit but his face.
Diogenes Of Sinope

A few months ago, I remember some discussion of how everyone's pending credit was increasing relative to their RAC. At that point, people were reporting pending credit of 6-7x their RAC, and this was considered unusually high, but it seemed to be a project-wide phenomenon. Mine is currently 2.6 times my RAC.